[ryanricard]

According to the "How it Works" page, "we know which dealers are the friendliest, which ones will give you the best prices, and which ones to avoid completely." Presumably they wouldn't send you any quotes from known bad dealers, but obviously the question is whether or not they can execute on that promise.

True, the dealer can still haggle you on trade-ins and financing, but removing the "price of new car" variable simplifies that negotiation quite a bit. One of the current tactics that works very well for dealerships is trying to throw as many variables at you as possible (Google the "four square method"). Plus you can always sell your car to someone else instead of the dealership, and/or get a loan from your own bank.